potassium carbonate in dichloromethane Ambient temperature;

benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride in dichloromethane T=20°C;

in dichloromethane T=0°C;

potassium carbonate in ethanol; water 4 h; Irradiation;

1: 94 percent / dioxane; H2O / 10 h / Heating 2: 71 percent / NaH / tetrahydrofuran / 11 h / 20 °C 3: NaBH4 / methanol; tetrahydrofuran / 2 h / 4 - 7 °C 4: BF3*OEt2 / CH2Cl2 / 15 h / 20 °C 5: 68 percent / Na(Hg); sodium phosphate / methanol / 2 h / 20 °C View Scheme

in 1,4-dioxane; water 10 h; Heating;

in 1,4-dioxane; water 10 h; Heating;